summaryrefslogtreecommitdiff
path: root/drivers/accel/ivpu/ivpu_pm.c
blob: 5f73854234ba93da22b00113376c296df1ebd35a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2020-2023 Intel Corporation
 */

#include <linux/highmem.h>
#include <linux/moduleparam.h>
#include <linux/pci.h>
#include <linux/pm_runtime.h>
#include <linux/reboot.h>

#include "vpu_boot_api.h"
#include "ivpu_drv.h"
#include "ivpu_hw.h"
#include "ivpu_fw.h"
#include "ivpu_fw_log.h"
#include "ivpu_ipc.h"
#include "ivpu_job.h"
#include "ivpu_jsm_msg.h"
#include "ivpu_mmu.h"
#include "ivpu_pm.h"

static bool ivpu_disable_recovery;
module_param_named_unsafe(disable_recovery, ivpu_disable_recovery, bool, 0644);
MODULE_PARM_DESC(disable_recovery, "Disables recovery when VPU hang is detected");

static unsigned long ivpu_tdr_timeout_ms;
module_param_named(tdr_timeout_ms, ivpu_tdr_timeout_ms, ulong, 0644);
MODULE_PARM_DESC(tdr_timeout_ms, "Timeout for device hang detection, in milliseconds, 0 - default");

#define PM_RESCHEDULE_LIMIT     5

static void ivpu_pm_prepare_cold_boot(struct ivpu_device *vdev)
{
	struct ivpu_fw_info *fw = vdev->fw;

	ivpu_cmdq_reset_all_contexts(vdev);
	ivpu_ipc_reset(vdev);
	ivpu_fw_load(vdev);
	fw->entry_point = fw->cold_boot_entry_point;
}

static void ivpu_pm_prepare_warm_boot(struct ivpu_device *vdev)
{
	struct ivpu_fw_info *fw = vdev->fw;
	struct vpu_boot_params *bp = ivpu_bo_vaddr(fw->mem);

	if (!bp->save_restore_ret_address) {
		ivpu_pm_prepare_cold_boot(vdev);
		return;
	}

	ivpu_dbg(vdev, FW_BOOT, "Save/restore entry point %llx", bp->save_restore_ret_address);
	fw->entry_point = bp->save_restore_ret_address;
}

static int ivpu_suspend(struct ivpu_device *vdev)
{
	int ret;

	/* Save PCI state before powering down as it sometimes gets corrupted if NPU hangs */
	pci_save_state(to_pci_dev(vdev->drm.dev));

	ret = ivpu_shutdown(vdev);
	if (ret)
		ivpu_err(vdev, "Failed to shutdown VPU: %d\n", ret);

	pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D3hot);

	return ret;
}

static int ivpu_resume(struct ivpu_device *vdev)
{
	int ret;

	pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D0);
	pci_restore_state(to_pci_dev(vdev->drm.dev));

retry:
	ret = ivpu_hw_power_up(vdev);
	if (ret) {
		ivpu_err(vdev, "Failed to power up HW: %d\n", ret);
		goto err_power_down;
	}

	ret = ivpu_mmu_enable(vdev);
	if (ret) {
		ivpu_err(vdev, "Failed to resume MMU: %d\n", ret);
		goto err_power_down;
	}

	ret = ivpu_boot(vdev);
	if (ret)
		goto err_mmu_disable;

	return 0;

err_mmu_disable:
	ivpu_mmu_disable(vdev);
err_power_down:
	ivpu_hw_power_down(vdev);

	if (!ivpu_fw_is_cold_boot(vdev)) {
		ivpu_pm_prepare_cold_boot(vdev);
		goto retry;
	} else {
		ivpu_err(vdev, "Failed to resume the FW: %d\n", ret);
	}

	return ret;
}

static void ivpu_pm_recovery_work(struct work_struct *work)
{
	struct ivpu_pm_info *pm = container_of(work, struct ivpu_pm_info, recovery_work);
	struct ivpu_device *vdev = pm->vdev;
	char *evt[2] = {"IVPU_PM_EVENT=IVPU_RECOVER", NULL};
	int ret;

	ivpu_err(vdev, "Recovering the VPU (reset #%d)\n", atomic_read(&vdev->pm->reset_counter));

	ret = pm_runtime_resume_and_get(vdev->drm.dev);
	if (ret)
		ivpu_err(vdev, "Failed to resume VPU: %d\n", ret);

	ivpu_fw_log_dump(vdev);

	atomic_inc(&vdev->pm->reset_counter);
	atomic_set(&vdev->pm->reset_pending, 1);
	down_write(&vdev->pm->reset_lock);

	ivpu_suspend(vdev);
	ivpu_pm_prepare_cold_boot(vdev);
	ivpu_jobs_abort_all(vdev);

	ret = ivpu_resume(vdev);
	if (ret)
		ivpu_err(vdev, "Failed to resume NPU: %d\n", ret);

	up_write(&vdev->pm->reset_lock);
	atomic_set(&vdev->pm->reset_pending, 0);

	kobject_uevent_env(&vdev->drm.dev->kobj, KOBJ_CHANGE, evt);
	pm_runtime_mark_last_busy(vdev->drm.dev);
	pm_runtime_put_autosuspend(vdev->drm.dev);
}

void ivpu_pm_trigger_recovery(struct ivpu_device *vdev, const char *reason)
{
	ivpu_err(vdev, "Recovery triggered by %s\n", reason);

	if (ivpu_disable_recovery) {
		ivpu_err(vdev, "Recovery not available when disable_recovery param is set\n");
		return;
	}

	if (ivpu_is_fpga(vdev)) {
		ivpu_err(vdev, "Recovery not available on FPGA\n");
		return;
	}

	/* Trigger recovery if it's not in progress */
	if (atomic_cmpxchg(&vdev->pm->reset_pending, 0, 1) == 0) {
		ivpu_hw_diagnose_failure(vdev);
		ivpu_hw_irq_disable(vdev); /* Disable IRQ early to protect from IRQ storm */
		queue_work(system_long_wq, &vdev->pm->recovery_work);
	}
}

static void ivpu_job_timeout_work(struct work_struct *work)
{
	struct ivpu_pm_info *pm = container_of(work, struct ivpu_pm_info, job_timeout_work.work);
	struct ivpu_device *vdev = pm->vdev;

	ivpu_pm_trigger_recovery(vdev, "TDR");
}

void ivpu_start_job_timeout_detection(struct ivpu_device *vdev)
{
	unsigned long timeout_ms = ivpu_tdr_timeout_ms ? ivpu_tdr_timeout_ms : vdev->timeout.tdr;

	/* No-op if already queued */
	queue_delayed_work(system_wq, &vdev->pm->job_timeout_work, msecs_to_jiffies(timeout_ms));
}

void ivpu_stop_job_timeout_detection(struct ivpu_device *vdev)
{
	cancel_delayed_work_sync(&vdev->pm->job_timeout_work);
}

int ivpu_pm_suspend_cb(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct ivpu_device *vdev = to_ivpu_device(drm);
	unsigned long timeout;

	ivpu_dbg(vdev, PM, "Suspend..\n");

	timeout = jiffies + msecs_to_jiffies(vdev->timeout.tdr);
	while (!ivpu_hw_is_idle(vdev)) {
		cond_resched();
		if (time_after_eq(jiffies, timeout)) {
			ivpu_err(vdev, "Failed to enter idle on system suspend\n");
			return -EBUSY;
		}
	}

	ivpu_jsm_pwr_d0i3_enter(vdev);

	ivpu_suspend(vdev);
	ivpu_pm_prepare_warm_boot(vdev);

	ivpu_dbg(vdev, PM, "Suspend done.\n");

	return 0;
}

int ivpu_pm_resume_cb(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct ivpu_device *vdev = to_ivpu_device(drm);
	int ret;

	ivpu_dbg(vdev, PM, "Resume..\n");

	ret = ivpu_resume(vdev);
	if (ret)
		ivpu_err(vdev, "Failed to resume: %d\n", ret);

	ivpu_dbg(vdev, PM, "Resume done.\n");

	return ret;
}

int ivpu_pm_runtime_suspend_cb(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct ivpu_device *vdev = to_ivpu_device(drm);
	bool hw_is_idle = true;
	int ret;

	drm_WARN_ON(&vdev->drm, !xa_empty(&vdev->submitted_jobs_xa));
	drm_WARN_ON(&vdev->drm, work_pending(&vdev->pm->recovery_work));

	ivpu_dbg(vdev, PM, "Runtime suspend..\n");

	if (!ivpu_hw_is_idle(vdev) && vdev->pm->suspend_reschedule_counter) {
		ivpu_dbg(vdev, PM, "Failed to enter idle, rescheduling suspend, retries left %d\n",
			 vdev->pm->suspend_reschedule_counter);
		pm_schedule_suspend(dev, vdev->timeout.reschedule_suspend);
		vdev->pm->suspend_reschedule_counter--;
		return -EAGAIN;
	}

	if (!vdev->pm->suspend_reschedule_counter)
		hw_is_idle = false;
	else if (ivpu_jsm_pwr_d0i3_enter(vdev))
		hw_is_idle = false;

	ret = ivpu_suspend(vdev);
	if (ret)
		ivpu_err(vdev, "Failed to set suspend VPU: %d\n", ret);

	if (!hw_is_idle) {
		ivpu_err(vdev, "VPU failed to enter idle, force suspended.\n");
		ivpu_fw_log_dump(vdev);
		ivpu_pm_prepare_cold_boot(vdev);
	} else {
		ivpu_pm_prepare_warm_boot(vdev);
	}

	vdev->pm->suspend_reschedule_counter = PM_RESCHEDULE_LIMIT;

	ivpu_dbg(vdev, PM, "Runtime suspend done.\n");

	return 0;
}

int ivpu_pm_runtime_resume_cb(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct ivpu_device *vdev = to_ivpu_device(drm);
	int ret;

	ivpu_dbg(vdev, PM, "Runtime resume..\n");

	ret = ivpu_resume(vdev);
	if (ret)
		ivpu_err(vdev, "Failed to set RESUME state: %d\n", ret);

	ivpu_dbg(vdev, PM, "Runtime resume done.\n");

	return ret;
}

int ivpu_rpm_get(struct ivpu_device *vdev)
{
	int ret;

	ret = pm_runtime_resume_and_get(vdev->drm.dev);
	if (!drm_WARN_ON(&vdev->drm, ret < 0))
		vdev->pm->suspend_reschedule_counter = PM_RESCHEDULE_LIMIT;

	return ret;
}

int ivpu_rpm_get_if_active(struct ivpu_device *vdev)
{
	int ret;

	ret = pm_runtime_get_if_active(vdev->drm.dev, false);
	drm_WARN_ON(&vdev->drm, ret < 0);

	return ret;
}

void ivpu_rpm_put(struct ivpu_device *vdev)
{
	pm_runtime_mark_last_busy(vdev->drm.dev);
	pm_runtime_put_autosuspend(vdev->drm.dev);
}

void ivpu_pm_reset_prepare_cb(struct pci_dev *pdev)
{
	struct ivpu_device *vdev = pci_get_drvdata(pdev);

	ivpu_dbg(vdev, PM, "Pre-reset..\n");
	atomic_inc(&vdev->pm->reset_counter);
	atomic_set(&vdev->pm->reset_pending, 1);

	pm_runtime_get_sync(vdev->drm.dev);
	down_write(&vdev->pm->reset_lock);
	ivpu_prepare_for_reset(vdev);
	ivpu_hw_reset(vdev);
	ivpu_pm_prepare_cold_boot(vdev);
	ivpu_jobs_abort_all(vdev);
	ivpu_dbg(vdev, PM, "Pre-reset done.\n");
}

void ivpu_pm_reset_done_cb(struct pci_dev *pdev)
{
	struct ivpu_device *vdev = pci_get_drvdata(pdev);
	int ret;

	ivpu_dbg(vdev, PM, "Post-reset..\n");
	ret = ivpu_resume(vdev);
	if (ret)
		ivpu_err(vdev, "Failed to set RESUME state: %d\n", ret);
	up_write(&vdev->pm->reset_lock);
	atomic_set(&vdev->pm->reset_pending, 0);
	ivpu_dbg(vdev, PM, "Post-reset done.\n");

	pm_runtime_mark_last_busy(vdev->drm.dev);
	pm_runtime_put_autosuspend(vdev->drm.dev);
}

void ivpu_pm_init(struct ivpu_device *vdev)
{
	struct device *dev = vdev->drm.dev;
	struct ivpu_pm_info *pm = vdev->pm;
	int delay;

	pm->vdev = vdev;
	pm->suspend_reschedule_counter = PM_RESCHEDULE_LIMIT;

	init_rwsem(&pm->reset_lock);
	atomic_set(&pm->reset_pending, 0);
	atomic_set(&pm->reset_counter, 0);

	INIT_WORK(&pm->recovery_work, ivpu_pm_recovery_work);
	INIT_DELAYED_WORK(&pm->job_timeout_work, ivpu_job_timeout_work);

	if (ivpu_disable_recovery)
		delay = -1;
	else
		delay = vdev->timeout.autosuspend;

	pm_runtime_use_autosuspend(dev);
	pm_runtime_set_autosuspend_delay(dev, delay);

	ivpu_dbg(vdev, PM, "Autosuspend delay = %d\n", delay);
}

void ivpu_pm_cancel_recovery(struct ivpu_device *vdev)
{
	drm_WARN_ON(&vdev->drm, delayed_work_pending(&vdev->pm->job_timeout_work));
	cancel_work_sync(&vdev->pm->recovery_work);
}

void ivpu_pm_enable(struct ivpu_device *vdev)
{
	struct device *dev = vdev->drm.dev;

	pm_runtime_set_active(dev);
	pm_runtime_allow(dev);
	pm_runtime_mark_last_busy(dev);
	pm_runtime_put_autosuspend(dev);
}

void ivpu_pm_disable(struct ivpu_device *vdev)
{
	pm_runtime_get_noresume(vdev->drm.dev);
	pm_runtime_forbid(vdev->drm.dev);
}